Car truck



Sept. 29, 1931. K. M. HAMILTON CAR TRUCK Filed Nov. 2 1927 2 Sheets-Sheet l Iivenfar Karl fill/4mm? Sept. 29, 1931. K. M. HAMILTON CAR TRUCK Filed Nov. 2. 1927 2 Sheets-Sheet 2 Patented Sept, 29, 1931 warren stares iszaeee re-rear o t-rice KARI. M. HAMILTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO. THE IBE'ITEN-DORI COM- EANY, OF IBETTEITDORF, IOWA, A CORPORATION OF IOWA.

GAR TRUCK Application filed November 2, 1927.. Serial No. 230,412.

This invention relates to improvements in car trucks. I

An object of my invention is to provide 1 an efiicient, strong and durable truck of the swing motion type, wherein a cast transom is provided whic is supported on yieldably mounted supporting bars carried by the side,

suspended from the side frames and the.

bolster mounted for movement laterally with respect to said side frames.

Other and further objects of the invention will more clearly appear from the description and claims hereinafter following.

- In the drawings forming a part of this specification, Figure 1 is a top plan view of a portion of a truck showing portions of my improvements applied thereto. Figure 2 is a vertical sectional view taken'transversely of the truck and corresponding substantially to the line 2-2 of Figure 1. Figure 3 is a side elevational view of a truck having my improvements embodied therein, parts of the side frame having been broken away to accommodate' the figure on the sheet. Figure 4 is a horizontal sectional view of the invention corresponding substantially to the line 4-4 of Figure 3. And Figure 5 is a transverse sectional view of the invention corresponding substantially to theline-5-5 of Figure 3. In said figures it has not been deemed necessary to illustrate the entire truck inasmuch as the nature of the invention is clearly indicated by the parts shown. 7 v

In said drawings, the side frame is indiformed upper arch bar 10, and integrally cated generally by the reference character A; the transom' at B; the carrier bars at C; the

formed lower arch bar 11, integrally formed journal boxes 12-12 and integrally formed vertical columns 13-13. The arch bar 10, as well as the columns 13-13 are illustrated of U-cross section as best shown in Figures 1' and 2 in order 'to provide great strength for a given weight of material, while the lower arch bar 11, from a cegtral point with reference to the side frame to a, point somewhat outwardly beyond'the columns 13, is of reduced width and box-shaped in cross section as indicated at 14, the remaining portions of the arch bar 11 between the box-shaped portion and the journal boxes 12-12 being of U-cross section for the most part except for the portions which'serve as supports for the carrier bars C hereinafter described. In the side frames arranged and constructed as indicated, it is evident that a large central opening 15 is left in each side frame which opening is defined at its upper edge by the upper arch bar 10 on its sides by' the columns 13-13, and at the bottom by the horizontally extend-' ingsection 14 of the lower arch bar.

Extending from side frame to side frame 7 and co-operable therewith is the transom casting B. The latter comprises two spaced elongated beams 16-16 arranged parallel at their outer ends as indicated at 17, thence diverging, as indicated at 18, until the center line is reached and thence converging and parallel on the opposite end as will be clear from an inspection of Figure 1.' The two main.

horizontal beams 16-16 are connected at their respective ends by a vertically disposed, open, 35 rectangular section as best illustrated in Figure 3. Each of said end sections includes a top connecting portion 19 formed integrally with the inner top end portionsof the beams 16-16, the end portions'20-20 of the beams 16-16, the vertically disposed side arms 21-21 and a horizontal bottom connecting section 22. The top connecting portion 19 is of inverted U-shaped cross section. Each of the arms 21-21 comprises a wall 23, the opposite edges of which have formed integrally therewith spaced walls 24-24 connected by an angular portion 25 on the wall 23 which forms a web between the walls 24-24, and the walls 24-24 are connected at their outer'ends, the walls 24-24 extending in spaced relation below the web 25 to form the furcations 26-26. The furcations of each of the arms 2121 are connected by spaced cross members 27 -27 which are formed with angular flan es 2828, said connecting members being a apted to straddle the section 14 of the side frame and co-operate with the car rier bars 0 as hereinafter described. The walls 2424 are strengthened on the outer surface of the rectangular section by ribs 29, while on the inner sides .of said arms webs 30 are provided which are connected to the beam members 16--16.

Two carrier bars C are provided for each side frame A, one of said carrier bars indicated at 31 being disposed upon the inner side of the lower arch bar 11, while the other bar indicated at 32 is disposed upon the outer side of the arch bar ll. The carrier bar 32 comprises a horizontally extending portion 33 upon which rests the connecting portion 27 of the transom, the flange 28 being disposed upon the outer side of the bar. so as to maintain the same in position. Said bar also includes inclined extensions 34-34 terminating in horizontally disposed end portions 35-35, each end portion 35 being provided with a groove 36 in its under surface adapted to co-operate with one of the spring arrangements adjacent opposite ends of the side frames indicated broadly by the reference characters 37-37. The inner carrier bar 31 is identical in construction with the carrier bar 32, the opposite ends of both of the bars 31 and 32 being adapted to cooperate with the spring arrangements 37--37 carried by the side frame.

Each of the spring arrangements 37 includes a seat 38 formed in the inclined portion of the bottom arch bar 11, which seat accommodates the coiled spring 39. Mounted on the upper end of the coiled spring 39 is a cup-shaped follower 40, the upper surface of which is provided with transversely spaced pairs of ears 4l41 and between theears of each pair is a transversely extending rib indicatedat 42, each of said ribs being adapted to project into the groove 36 formed in the under-surface of the end 35 of the related carrier bar. The follower 40 is provided with spaced lugs 4O adapted to movably fit upon the opposite sides of the portion 40 of the frame. The spring arrangement 37 at the o posite end of the truck is identical with t at described and accommodates the opposite ends of the bars C.

The bolster D is of the cast type, but as will be obvious, 'may be of any desired design. It is provided with the usual center plate 43 and bearing plate sections 44 for the usual side bearings. The bolster D is supported at its ends on a pair of elliptical springs E, which extend longitudinally outward through the opening in the rectangular section provided by the transom. In order to maintain the springs E properly aligned with the bolster, the bolster is preferably provided with a depending pair of lugs 4545 on each side of the related spring, which are adapted to straddle-the usual spring band indicated at 46. With this arrangement the bolster D is interlocked with the elliptical spring E against movements either lengthwise of the bolster or transversely of the bolster.

The spring plank F, shown of the usual channel cross section, is supported through the intermediary of the hanger links 47-47 and cross key 48, the hanger links being pivotally supported from the beams 1616 of the transom casting by means of pins 49 engaging suitable bearings provided in the transom casting, the beams of the latter being suitably slotted as indicated at 50 to permit the links 47 to pass, vertically therethrough. The key 48 supports a spring plank bearing casting 51 which is provided with a pair of upstanding lugs indicated at 52, adapted to be extended through correspondingly located perforations in spring plank F. The lugs 52 are adapted to enter corresponding located openings in a cast spring seat 53, the latter being provided with sets of upstanding lugs 54-54, corresponding to the bolster lugs 45-45, and co-operable with the lower section of the elliptical spring E and its hand 55, to maintain the spring in alignment and prevent sidewise tilting in a horizontal plane and longitudinal shifting of the spring with reference to the spring seat.

By the arrangement above described, it will be observed that the transom is a one piece construction, is yieldably supported upon the side frame by the carrier bars G, and held in position by said bars, while the bolster is supported by the elliptical spring mounted upon the spring plank which is swingably suspended from the bolster, the construction affording an exceptionally simple design wherein all of the load transmitting parts are yieldably suspended from the side frames, and the bolster permitted the desired longitudinal movement laterally with reference to the truck side frames.

While I have herein shown and described what I consider the preferred manner of carrying out the invention, the same is merely illustrative and I contemplate all changes and modifications which come within 'the scope of the claims appended hereto.

I claim:

1. In a truck, the combination with the side frames having central openings; of a transom having its opposite ends received in said openings; carrier bars'yieldably mounted on said frames upon which the ends of said transom rest; springs extending through said central openings and suspended from said transom for lateral movement rsaaeeo" tending beneath the ends of said transom for yieldably supporting the ends of said tran som; a bolster; and springs extending through said openings and hung from said transom for swingably supporting said bolster from said transom for movement laterally of said truck.

3. In a truck, the combination with the side frames thereof having central openings;

of a transom having its end portions disposed in said openings and movable vertically therein; means yieldably mounted on said side frame, said means comprising bars extending lengthwise of the frames upon which the transom ends are supported in interlocked relation, springs between the frames and the ends of said bars for yieldingly supporting the bars; a bolster; and springs extending through said openings and suspend-\ ed from said transom for yieldably supporting said bolster from said transom, said means permitting longitudinal movement of the bolster relative to said side frames.

4. In a truck, the combination with the side frames, each of the latter having upper and lower bars and spaced columns therebetween, each lower bar beingprovided with spring seats at opposite sides of sa 1d columns, said seats accommodatingsprings; a follower supported on each of said springs; carrier bars disposed at opposite sides of each side, frame and having their end portions resting upon said followers; a transom projecting between said columns and supported upon said carrier bars, the opposite ends of said transom being provided Wlth spaced vertical arms at each end, each of said arms being" forked and the forked portions connected by' cross pieces; and a bolster swirfgably supported by said transom, the cross pieces of said transom being adapted to interlock with said carrier bars to maintain said transom against longitudinal movement. 1

5 As an article of manufacture, a cast transom for a truck, said transom com using elongated spaced beams, and ang arly disposed end sections, each of the latter beingof approximately rectangular outline,

and including spaced arms, eachof which' has a forked end portion, and cross pieces connecting the furcations at opposite sides of said arms.

6. As an article of manufacture, a cast transom for trucks comprising: two longitudinally extending beams having a connecting member at their ends, and two spaced 1 arms at each end of said transom extending away from the connecting member at an angle to the plane in which said beams lie,

said arms having forked end portions and cross pieces connecting the furcations at opposite sides of said arms, said cross pieces being flanged for co-operation with parts of a truck, f

7. As an article of manufacture, a cast transom for trucks adapted. to fit into the' central side frame openings, and comprising: two longitudinally extending beams having a connecting member attheir o posite ends, and two spaced arms-at each en of said transom extending away from the connecting member at an angle to the plane in which said beams lie, said arms being connected by spaced cross I members.

8. In a truck, the combination with the its opposite ends disposed between pairs of ears on said followers and each end of said bars provided with a recess for the reception of one of said ribs; a transom having rectangularend sections disposed in the openings in said frames and provided with spaced cross members, each of which bears upon the intermediate portion of one of said carrier bars; a spring plank hanger links swingably mounted upon said transom and supporting said spring plank; an elliptical springmeans interposed between said bolster and said spring plank, said spring means extending in a direction common with said bolster, and projecting outwardly through openings in said transom and said side frame.

9. In a truck, the combination with the side frames, each having upper and lower arch bars and vertically disposed columns therebetween, the lower ofsaid arch bars being provided with sprin seats at opposite sides of said columns a apted to accommodate springs; followers for said springs, each of said followers being provided with spaced pairs of ears between each pair of which extends a rib; carrier bars disposed at opposite sides of each side frame and each bar having its opposite ends disposed between pairs of ears on said followers and each end of said bars provided with a recess for the reception of one of said ribs;'a transom having rectangular end sections disposed in the openings in said frames and provided with spaced cross members, each of which bears upon the intermediate portion of one of said carrier bars; a spring plank; hangar links swingably mounted upon saidtransom and supporting said spring plank; an elliptical spring means 4 interposed between said bolster and said spring plank, said spring means extending in a direction common wlth said bolster and projecting outwardly through the openings in said transom and said side frame, said spring means being provided with a band disposed about the plates thereof, and said spring plank and said bolster being provided with spaced pairs of lugs engaging opposite sides of said spring means and straddling said band.

In witness that I claim the foregoing I have hereunto subscribed my name this 28th day of October, 1927.

KARL M. HAMILTON. 

